6. But the Internet will melt if the Cubs win the 2015 World Series.

7. When Marty McFly was 13 or 14, he snuck into Doc's lab and wound up getting a part-time job.

"He snuck into Doc’s lab, and was fascinated by all the cool stuff that was there. When Doc found him there, he was delighted to find that Marty thought he was cool and accepted him for what he was. Both of them were the black sheep in their respective environments. Doc gave Marty a part-time job to help with experiments, tend to the lab, tend to the dog, etc."

When Slate wrote a story questioning whether Bob Gale was actually behind the explanation, he sent us this:

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8. In the early drafts of Back to the Future, the time machine was made out of an old refrigerator...

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9. ...and Doc Brown had a pet chimpanzee.

The head of Universal was anti-chimpanzee: "I looked it up," he said, "no movie with a chimpanzee ever made any money."

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10. In an early draft of Back to the Future II, Marty travels to 1967, where he's arrested for not having a draft card.

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11. The Back to the Future II promotional sunglasses sold at Pizza Hut are available on eBay.

21. John DeLorean wrote Bob Gale a letter, thanking him for "keeping my dream alive."

22. The school that served as Hill Valley High School in Back to the Future was Whittier High—Richard Nixon's alma mater.

23. In Back to the Future II, an old newspaper in the alternate 1985 reads, “Nixon to Seek Fifth Term; Vows End to Vietnam War by 1985.”

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24. The whole Hill Valley Telegraph is worth another look.

As Jonathan Chiat noted in an excellent round-up of the paper's front pages for New York Magazine, "It is unclear why the Telegraph’s editors would devote such extensive space to Biff Tannen gambling coverage."

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25. In the early-1990s Back to the Future cartoon, Dan Castellaneta (Homer Simpson) was the voice of Doc Brown.

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A Back to the Future musical is headed for London next year. Zemeckis and Gale are on board.

Also on Mental Floss:

DID YOU KNOW? Marlon Brando hated memorizing lines so much that he posted cue cards everywhere to help him get through scenes.
He even asked for lines to be written on an actress's posterior. (That request was denied.)